In order to guarantee a high level of security, the certificates must meet the following conditions:
- Validity: Not expired
- Version: V3
- Signature algorithm: sha224RSA, sha256RSA, sha384RSA, sha512RSA
- Key length: At least RSA (2,048 bits)
- Key usage: Client authentication
- Issuer: See list below
Once a valid certificate is available, the main contact in charge of eBill at your company must send the certificate's public key to firstname.lastname@example.org via e-mail.